西藏正式成为中国的一个行政区域,开始于 [ ]
A.唐朝
B.宋朝
C.元朝
D.明朝
答案:C
“What did the teacher tell you to do? ” “I have to write a __ composition.”
A.two-thousand-word
B.two-thousand-word
C.two-thousands-words
D.two-thousand-words
一桶油连桶重350千克,倒出一半后,连桶重200千克,这桶油重多少千克?桶重多少千克?